Pump.



45 In Ythe-drawings: Figure 1 is a view in .transverse sectional elevation through the :muren sTAT-Es f OFFICE. i

i ALBERT minnesota-'di N. Y.V

.Y l Y I ese-,911;

l mmmoz'rewrsrame continuation u: aplicado; sei-m1 no. 341,550, ala November 1, woe.L rm appumioi menen-.mbar

Patented Nov. e, 1909.-

23', 1907. seria; No; masia.

To t may concern;

Be 1t known that we, ALBnRT HnmANN, a citizen of the United States of' America, and

a resident of New York City, county, and

State, and Lno FLA'roW, a subject of the Emperor of Germany, and aV resident of New York city, county, and State, have invented vboth ends of the blades. form of mechanism which We Aemplo for certain new and useful Improvements in Pumps, off which the following is aspecifiI` cation, reference being had to the accomf panying drawings, forming a part thereof.

ur invention relates to improvements in pumps, and particularly to improvements in rotary umps of the type employing a substantia y cylindrical casing, and a lrub mounted to rotate therein upon a center eccentric of the center of the casing, said hub carrying radial paddle blades which move toward and away from thecenter of the said hub as the said hub revolves.

Thisapplication isa continuation of anapplication Serial Number 341,550, filed'by us onNovember 1, 1906.

.The main object of our invention is to provide an adjustment for the paddle blades in' the radial lines in which they move, so as to take up forwear between'the outer surfaces of the said paddle blades and the inner surfv faces of the casing and particularly to pro-v vide for the' arallel adjustment thereof, that 1s to say, or the adjustment equally of In the preferable -this purpose, said adjustment is e ected through the-center of the shaft upon `which the said'hub' revolves, whereby access may be had to the saidadjusting means, and said adjustment effected without opening up or dlsmantling the pump in any way.

In forder that our invention may 'be fully understood, wepwill now proceed to describe a pump constituting an embodiment thereof, w `havin reference tothe accompanying drawings ustrating same, andwillthen point ou' f the-novel features in claims.

. detail view .in'central O ngitudinal sectlon of certain vpartsfof` the pump showing a modified construction 'of the adjusting means view in central' longitudinal section, showing a further modification.

The'pump comprises' generally a casing 5, a rotating hub 6 mounted therein, and radial paddle blades 7 carried by the vhubf The interior of the casing 5 is 015 substantially cya shaft 8, said shaft mounted to rotate in ing. The axis of rotation of the shaft 8 is terior walls 10 ofthe casing 5; The interior walls 10 are not truly cylindrical, though their form is substantially cylindrical, as stated.` Actually, the distance between the opposite walls 10 is always the same upon any straight .line which passes through the axis of the shaft'S, and for this reason the opposite paddle blades 7 may be, and are,

work freely in pockets 11 in the hub 6, so that they may `move backward and forward radially,'but,'` in the normal operation 'site blades is never varied.- At their outer faces the paddle blades are provided with curved surfaces 12 to which are fitted wearing shoes 13. The outer faces of the wearing shoes 13 are fitted to the curve of the inner wallsiof the casing 5, While the inner faces of the wearing shoes 13 are tted` to the curve of the recesses 12.

It will be-readily understoodthat a certain amount of wear will take place between the outer faces of the wearing shoes 13 and compensate for this, I have provided means for adjusting the opposite paddle blades 7 with respect to each other. Taking any two opposite blades, one of the said blades has ject inwardly therefrom, passing through 'opposite-side thereof into recesses in the opgage cam .surfaces 15 carried byja cam piece 1 6, which cam plece is mounted 1n a lon i- At one end the said cam piece engages the conicalV end 18 of an .adjusting stem .19; which adjusting stem has a screw-threaded connection with` the'paddle blade 7 aforeeccentric with respect to the axis of`the in' connected together. TheJsaid paddle blades rigidly secured thereto stems 111 which pro` lindrical form. The hub 6' is mounted upon bearings 9 formed as a part of the pump cas-v i I of the pump, the distance between theoppothe inwardly facing walls l0. In order t0 the shaft and extending outward upon the posite blade. The ends ofA these stems entudinal bore 17 in the said paddle bla e.

said. A rotation of the adjusting stemv 19 K in one direction will force the cam piece'16 in such a direction as to separate the opv paddle blade which Icarries the cam piece 16 and adjusting stem 19, normally oppose the outwardor separating movements of the paddle blades Vwith respect to each other, thereby preventing any loosenes or rattling of the blades at any time. The said springs 2() bear upon one side against a plate 22 secured to one p addle blade, and on the other side against collars 23 which are secured upon the stems 14, whichare themselves fast to the other paddle blade 7 Referring for the moment more particularly to the example of our invention shown in Figs. 1 and 2, the adjusting stem `19er:-

tends into a sleeve 24, said sleeve mounted to rotate in ythe hub 6, but held against longitudinal movement therein.4 The stem 19 and sleeve 24 vare connected togetherl by a spline connection, whereby the stem is free to move longitudinally with respect to the sleeve, but is compelled to partake of its rotary movement.` At its inner end the .,sleeve 24 is `provided with bevel gear teeth 25, which are arranged in mesh With\bevel gear teeth 26 upon a spindle 27, which is rerceived within a hollow portion of the shaft 8. This shaft 27 is normally locked to the shaft 8 by means of a lock nut 28, but is provided with a hand wheel 29 by which it may be turned when freedom of movement is permitted to it 'by loosening the said lock nut. Manipulation -of the hand Wheel 29 to rotate the spindle 27 will rotate the sleeve 24 and so adjust the stem 19. Adjustment of the stem 19 will cause such a movement of the cam piece 16 as to adjust the opposite paddle blades 7 7 with respect to" each other, andas there is one set of such mechanisms for each pair' of blades employed, each said mechanism includingeonnecting stems 14, cam piece 1 6, adjustmg stem 19, sleeve 24, and bevel gear teeth 25, it follows that all the paddle bladesmay simultane-- ously be .adjusted by the manipulation of the hand wheel 29 aforesaid, The sliding connection between the adjusting stem 19 and the sleeve' 24 is provided. to permit of the free movement yof the paddle blades 7 in and out of'their recesses 11, without there'- by effecting the intermeshing of the bevel gear teeth 25 upon the sleeves 24 with the bevel gear. teeth A26 upon the spindle 27. Such an arrangement is not absolutely necessary, however, as in Fig.3 we have shown a modification -in which lthere is no such provision@ In this modification the stem 19 is itselfA4 provided at Vits inner end with bevel gear vteeth 30, which `intermesh with bevel' gear teeth 31 upon'the end of a spindle32, whichmay be inserted and removed at will. In this example of our invention thespindle 19, with its gear teeth 30, will reciprocate in the hub 6, the teeth 30,'which form a bevel ear wheel, being alternatelywithdrawn 4from the position in which they are shown in.

Fig. 3 to a position at some distance'outward from-such position. In this construction, when it is desired to adjust the paddle fblades, the hub 6 will be rotated to such a position as to bring the gear teeth 30`at va point to properly intermesh vviththe gear teeth 31, and the spindle 32, which is ordinarily removed from position in the shaft 8, will be` inserted vand caused to intermesh with the said teeth. A rotation of the spindle 32 willthen adjust the pair of paddle blades controlled by' the adjusting stem 19. To adjust another set of paddle blades it will then be necessary to rotate the hub 6 through a portion of a revolution suflicient to bring another adjusting stem 19 in a position to Vhave its teeth 3U engaged by the teeth 3l on the spindle 32, When adjustment thereof may be made inl-like manner. The

spindle 32 may now be withdrawn, as above explained, either entirely or to a point where its teeth 31 will fail to register with the teeth 30 of the adjusting spindle 19.

' By either of the foregoing methods it will be seen that ready adjustment of the paddle blades may be made to compensate for wear, such adjustment being obtained without opening the pump casingv or dismantling the pump 1n any way.

In Fig.'4 the adjusting stem for the cam ypiece is shown in line therewith as appears at 37,. In such caseithe casing 5 is provided with an opening 38, closed normally lby means of a plug 39," through which a tool.

may be introduced to eEect the desired adjustment. In this form as in the others a position of the valve will be open.` By this arrangement the valve will not in any way oppose clear passage of fluid through the discharge 34, but, should the pump be operating at any time when the intake is closed, so that the fluid contained in the intake and in the casing will all or nearly all be discharged, the valve 35 will close to prevent a return of air intothe casing, whereby the member 6 and paddleblades carried thereby Iparallel adjustment of the blades is assured,

L will be left to rotatein a partial vacuum.'

reason that less resistance will beA offered to ranged paddle blades carried by stems for connecting the said paddle blades' This will eifect a saving. of power, for the the rotation of the said rotary member, as will be well understood.

4What we' claim is: y

' ll. A rotary pump comprising a casing, an eccentrically arranged hub, diametrically arthe hub,

together, and mens operating c oncentrically witl the said hub,` but controlled from the exterior .'thereof, for adjusting the said connection, whereby the distance, between the two said paddle blades niay be lengthened -or shortened.

2. 'A rotary pump comprising a casing, an

eccentrically arranged hub, diametrically arranged patidle blades carried by the hub, stems for connecting the said paddle blades together, and a single adjusting stemplon gitudinally disposed within the said lfub, and having a plurality `of cam surfaces, one for engagement -with ieach said connecting stem, for simultaneously operating upon the said connecting stems to uniformly adjust the same, whereby the -distance between the two said paddle blades may be lengthened or shortened.

3. A rotary pump comprising a casing, an eccentrically arrangedJhub, diametrically arranged paddle blades carried by said hub, stems for connecting the said paddle blades together, said stems secured lfast to one paddle blade and having a'sliding lit with the other said paddle blade, and means operating concentrically with-the said hub, but

controlled from the exterior thereof, for adhub, arranged to engage the inner endet'.

said* adjusting stem foreifecting theisaid adjustment. I

5. A rotary pump comprising a casing, a hub eccentrica ly mounted with respect thereto, a radial paddle blade carried thereby-,a rotaryadjusting stem carried by said stem from the exterior of casing.

6.V A rotary pump .comprisinga casing, a

paddle blade, said stem provided with gear teeth, 'and a spindle having gear teeth for Vengagin the gear teeth of said spindle, mounte concentrically with respect to)the said hub'. v

hub mounted eccentrically thereof, ra ial paddle blades carried by s aid hub, an adjusting spindle for adjusting said paddle blades, a sleeve with which said adjusting spindle has a splined connection, said sleeve provided with gear teeth vat its innen end, and an operatingv spindle mounted concentrically with respect to the said hub, having gear teeth arranged to engage the gear teeth of said sleeve.

hub mounte eccentrically thereof, dialnetrically opposed paddle blades carried by said hub, connectin stems for connecting the two disposed cam means engaging the said stems, a radial adjusting'stem engaging said cam means, and means for rotating said'adjusting stem.

rically opposed paddle blades carried by said hub, connecting stems for. connecting the two said paddle blades together, longitudinally disposed cam means engaging ,the said stems, and a single rotatable adjusting stem for the said.. cani means.

10. A rota a hub mounte eccentricall thereof, diamet rically opposed paddle bla es carried by said disposed cam means engaging the said stems, a radial adjusting stein engaging said cam means, and' means operated from the exterior .of the pump casing for adjusting the said stem."

ALBERT HEIMANN. LEO FLATOW.

f `Viitnesses: j

D. HOWARD HAYWooD,

LYMaN'S. ANnnnws, Jr.

hub eccentrically \mounted withrespectV thereto, a radial paddle blade carried thereby, a rotary adjusting stemcarried by said pump comprising a easing,-

` paddle blade, and means for rotating said 7. A rotary pump comprising 'a casin a 8. A rotar pump comprising a easing,.a

said paddlegb ades together, vlongitudinally I 9. `A rotary pump comprising a casing, a i hub mounted eccentricallythereof, diamethub, connecting stems for connecting the two sa'id paddle blades together, longitudinally 

